@Kiki basically, the IRS expects you to pay any tax due quarterly. there are some rules that mitigate that, but that is the general rule.
if your tax payments and withholdings are at least the same as the prior year's liability or at least 90% of the current year liability, you are in the clear.
but I suspect that is not the case here. The tax on $85,0000 was about $12,750 and since the sale occured in June, broadly speaking, the IRS wou;d have wanted its money by Sept, 15.
It's somewhat arduous, but try going back and completing Form 2210 and check Box C. then complete the rest of the form as it will probably reduce the penalty.
The IRS otherwise assumes everything was smooth over 4 quarters of the year when it calculated the penalty. In this case you didn't owe the estimated payment on April 15, 2022 or Junr 15, 2022, so the penalty has probably been overstated.
does that help?
